一種直流系統(tǒng)接地故障排查方法的研究與分析
金宇1,邱凱翔2
(1 西安交通大學(xué) 電氣工程學(xué)院,陜西 西安 710049;2 深圳供電局有限公司,廣東 深圳 518001)
摘 要:直流系統(tǒng)的可靠與否是變電站安全運行的重要保證,以500 kV 鯤鵬站直流系統(tǒng)為例,介紹了變電站直流系統(tǒng)的組成及其作用,通過二次圖紙的分析闡述了直流系統(tǒng)接地故障排查的原則和方法,對直流系統(tǒng)接地選線裝置的選線原理進行分析,并做了理論推導(dǎo)。這種理論分析與實際排查相結(jié)合的方法能夠快速掌握現(xiàn)場工作方法,對現(xiàn)場工作具有指導(dǎo)意義。
關(guān)鍵詞:直流系統(tǒng);接地故障;排查方法;接地選線
中圖分類號:TM862 文獻標(biāo)識碼:A 文章編號:1007-3175(2017)06-0021-04
Analysis and Research of a Kind of Direct Current System Grounding Fault Detecting Method
JIN Yu1, QIU Kai-xiang2
(1 School of Electrical Engineering, Xi'an Jiaotong University, Xi’an 710049, China;
2 Shenzhen Power Supply Co., Ltd, Shenzhen 518001, China)
Abstract: Whether the direct current system is reliable is the important guarantee of safe operation in transformer substation. Taking 500 kV Kunpeng direct current transmission (HVDC) system for example, this paper introduced the composition of HVDC and its functions. Via secondary blueprint analysis, this paper expounded the principles and methods of HVDC system grounding fault detection and carried out analysis of route selection principle of direct current system grounding line selection device, together with theoretical derivation. This kind of theoretical analysis, combined with the practical detecting method, could fast grasp the live working situation with guiding significance.
Key words: direct current system; grounding fault; detecting method; ground wire
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